Rubber-cement-mixing machine



C. C. IVIOSHER. RUBBER'CEIVIENT MIXING MACHINE.

APPLICATION FILED DEC. 2, I9I9.

Patented July 27, 1920.

2 SHEETS-SHEET I.

witnesses C. C. IVIOSHER.

RUBBER CEMENT MIXING MACHINE.

APPLIcATloN FILED Dec. 2, 1919.

1,347, 650. Patented July 27, 1.920.

an uc nlvoz PATENT OFFICE;

CLIFFORD C. MOSHER, 0F LIMA, OI-I'IO.

RUBBER-CEMENT-MIXING MACHINE.

Specification of Letters Patent.

Patented Jul)T 27, 1920.

Application filed December 2, 1919. Serial No. 341,994.

To all whom it may concern.'

Be it known that I, CLIFFORD O. MosHER, a citizen of the United States, residing at Lima, in the county of Allen and State of Ohio, have invented new and useful Improvements in Rubber-Cement-Mixing Machines, of which the following is a specification.

This invention relates to machines for kneading and mixing semi-liquid viscous substances, more particularly rubber solution and cement, and its object is to enable `a mixture of the utmost uniformity to be made in a comparatively short period of time.

ln contradistinction to the usual practice in rubber cement mixers, in which the operation is performed in a rotating drum or cylinder, I use a stationary cylindrical trough, provided with openings for the introduction and discharge of the materials, and revolve at high speed therein an agitator or kneader of peculiar shape and construction, whereby l obtain a finer grade of cement and in less time than is possible with any of the othermixers now on the market of which I am aware. The essential feature of my invention is the mixing blade, which is so designed as to insure absolutely uniform mixing and, at the same time, to exert a pronounced kneading action o n the material.

It is immaterial, as far as my present invention is concerned, whether the trough be permanently fixed or whether it is tiltably mounted to facilitate discharge of the contents; both types are well known in the art so, for simplicitys sake, l have illustrated a fixed trough without tilting means. l have also omitted such details as the power connections, which are preferably such as to permit of two speeds, the construction of the bearings and stuffing boxes, etc., as forming no part of this invention.

The invention is illustrated in the accompanying drawing, in which,

Figure 1 is a longitudinal vertical section through the machine;

Fig. 2 is a side elevation of the mixing blade with the end collars shown in section;

lig. 3 is a plan view of the mixing blade, an

Fig. 4 is an end view of the same.

In Fig. l, 10 is a section of the mixing trough, comprising the cylinder 11 and the heads or ends 12, the latter being removably secured by bolts, not shown, to the frame standards 13. 14 are casings secured to said standards and containing the gearing by which the shaft 15 is driven. 16 is the admission opening in the cylinder 11, the same being provided with a dome-shaped, gastight cover 17, and 18 is the diametrically opposite discharge opening, which is also in practice provided with a gas-tight closure, not shown. The gases generated during the operation of mixing and dissolving the ingredients collect in the dome-shaped cover, thereby avoiding undue pressure in the cylinder and preventing excessive heating of the mixture.

Shaft 15 is journaled at 19 in the heads 12 and, as stated, is adapted to be driven at high speed by the gearing in the casings 14;. The agitator, mixer and kneader, indicated as a whole by 30, is rigidly mounted on the shaft by means of the collars or hubs 20, 20 and 21, the latter being on the center of the shaft midway between the heads 12, and each of the collars 2O being adjacent one of said heads. The mixer comprises two longitudinally arranged blades 22, 23, which are preferably given a slight spiral inclination and stand diametrically opposite each other with their ends overlapping, and each blade is connected at its outer end to the adjacent l ngi to insure a very high degree of uniformity in the mixture in a relatively short period of operation.

Having thus described my invention, What I olaim is:

In a machine of the Class described, an agitator comprising, in Combination With a shaft adapted to run axially through the machine, three hub members adapted to be se- 10 cured on said shaft, and two blade members,

each connected to one of the end hub members by a radial arm and to the center hub member by an oblique arm, the ends of the blade members extending beyond the conneotion With said oblique arms and overlapping eaoh other in their paths of travel.

In testimony whereof I have hereunto set my hand.

' Y CLIFFORD o. MOSHER. 

